I have no clue what you're talking about. Here, I'll explain how to use custom textures in a quick step-by-step:
1. Make sure you have a .JPG (or TGA) of your texture and a .WAL. The JPG's dimensions should be a power of 2. The WAL only exists to give BSP a texture name to use, it doesn't have to have anything in common with the texture except it's name.
2. Put the JPG in a folder in the textures directory of your pball directory. (e.g pball/textures/zomg) Then, put the WAL in a folder of the same name in the BSP textures directory (pball/textures/zomg).
3. In BSP, while editing your map, press L to load a texture directory. Choose your folder.
4. Now select the texture from the texture browser and apply it. Just make sure you package your custom textures with your map, and make sure they can be freely distributed.
Just to emphasize the point, you can't use textures that aren't GPL. Just don't do it, it'll cause a headache for quite a few people.